To access that module just click on a module name in your dashboard. You should see a display similar to the image below:
The right-hand section of the screen is where Course Content and tools are displayed.
The left-hand section of the screen is where the the Module Menu is displayed. This allows you to access content and tools in this module.
The lower-half of this menu, Course Management, offers additional tools and features for managing your course.
In the upper-right section of the screen, the Edit Mode button is available
“Edit Mode” allows you to turn on the ability to edit content in the module.
So to be able to edit the course and add content, you should make sure that Edit Mode is turned on.